package vn.edu.uit.service;

/**
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.TrustManager;

import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.scheme.LayeredSocketFactory;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;


/**
 * This socket factory will create ssl socket that accepts self signed
 * certificate.
 *
 * @author olamy
 * @version $Id: EasySSLSocketFactory.java 765355 2009-04-15 20:59:07Z evenisse
 * $
 * @since 1.2.3
 */
public class UITEasySSLSocketFactory implements LayeredSocketFactory {

       /** The sslcontext. */
       private SSLContext sslcontext = null;

       /**
        * Creates a new UITEasySSLSocket object.
        *
        * @return the SSL context
        * @throws IOException Signals that an I/O exception has occurred.
        */
       private static SSLContext createEasySSLContext() throws IOException {
               try {
                       SSLContext context = SSLContext.getInstance("TLS");
                       context.init(null, new TrustManager[] { new UITEasyX509TrustManager(
                                       null) }, null);
                       return context;
               } catch (Exception e) {
                    throw new IOException(e.getMessage());
               }
       }

       /**
        * Gets the sSL context.
        *
        * @return the sSL context
        * @throws IOException Signals that an I/O exception has occurred.
        */
       private SSLContext getSSLContext() throws IOException {
               if (this.sslcontext == null) {
                       this.sslcontext = createEasySSLContext();
               }
               return this.sslcontext;
       }

       /**
        * Connect socket.
        *
        * @param sock the sock
        * @param host the host
        * @param port the port
        * @param localAddress the local address
        * @param localPort the local port
        * @param params the params
        * @return the socket
        * @throws IOException Signals that an I/O exception has occurred.
        * @throws UnknownHostException the unknown host exception
        * @throws ConnectTimeoutException the connect timeout exception
        * @see org.apache.http.conn.scheme.SocketFactory#connectSocket(java.net.Socket,
        * java.lang.String, int, java.net.InetAddress, int,
        * org.apache.http.params.HttpParams)
        */
       public Socket connectSocket(Socket sock, String host, int port,
                       InetAddress localAddress, int localPort, HttpParams params)
                       throws IOException, UnknownHostException, ConnectTimeoutException {
               int connTimeout = HttpConnectionParams.getConnectionTimeout(params);
               int soTimeout = HttpConnectionParams.getSoTimeout(params);

               InetSocketAddress remoteAddress = new InetSocketAddress(host, port);
               SSLSocket sslsock = (SSLSocket) ((sock != null) ? sock : createSocket());

               if ((localAddress != null) || (localPort > 0)) {
                       // we need to bind explicitly
                       if (localPort < 0) {
                               localPort = 0; // indicates "any"
                       }
                       InetSocketAddress isa = new InetSocketAddress(localAddress,
                                       localPort);
                       sslsock.bind(isa);
               }

               sslsock.connect(remoteAddress, connTimeout);
               sslsock.setSoTimeout(soTimeout);
               return sslsock;

       }

       /**
        * Creates a new UITEasySSLSocket object.
        *
        * @return the socket
        * @throws IOException Signals that an I/O exception has occurred.
        * @see org.apache.http.conn.scheme.SocketFactory#createSocket()
        */
       public Socket createSocket() throws IOException {
               return getSSLContext().getSocketFactory().createSocket();
       }

       /**
        * Checks if is secure.
        *
        * @param socket the socket
        * @return true, if is secure
        * @throws IllegalArgumentException the illegal argument exception
        * @see org.apache.http.conn.scheme.SocketFactory#isSecure(java.net.Socket)
        */
       public boolean isSecure(Socket socket) throws IllegalArgumentException {
               return true;
       }

       /**
        * Creates a new UITEasySSLSocket object.
        *
        * @param socket the socket
        * @param host the host
        * @param port the port
        * @param autoClose the auto close
        * @return the socket
        * @throws IOException Signals that an I/O exception has occurred.
        * @throws UnknownHostException the unknown host exception
        * @see org.apache.http.conn.scheme.LayeredSocketFactory#createSocket(java.net.Socket,
        * java.lang.String, int, boolean)
        */
       public Socket createSocket(Socket socket, String host, int port,
                       boolean autoClose) throws IOException, UnknownHostException {
       return getSSLContext().getSocketFactory().createSocket(socket, host, port, autoClose);
       }

       // -------------------------------------------------------------------
       // javadoc in org.apache.http.conn.scheme.SocketFactory says :
       // Both Object.equals() and Object.hashCode() must be overridden
       // for the correct operation of some connection managers
       // -------------------------------------------------------------------

       /* (non-Javadoc)
        * @see java.lang.Object#equals(java.lang.Object)
        */
       public boolean equals(Object obj) {
               return ((obj != null) && obj.getClass().equals(
                               UITEasySSLSocketFactory.class));
       }

       /* (non-Javadoc)
        * @see java.lang.Object#hashCode()
        */
       public int hashCode() {
               return UITEasySSLSocketFactory.class.hashCode();
       }

}
